On Thu, 2020-01-16 at 09:08 +0800, fgodt wrote: > > By default, this is set to @code{1}, which means that gdigrab will > > use > > the CAPTUREBLT flag when grabbing images of a window. With this > > flag > > set, gdigrab will capture the entire contents of a window even if > > it is > > covered by other windows on the screen. > > > > If this option is set to @code{0}, the image captured will match > > what > > you see on the screen: the contents of any windows covering the > > selected window will be visible in the capture. > > > > Depending on your Windows version and graphics settings, you may > > see > > the mouse cursor flicker on your screen while capturing with this > > option set to @code{1}. If that happens, you can disable CAPTUREBLT > > by > > setting this option to @code{0}. > > > Thanks for you suggestion, but there is issue, without the > CAPTUREBLT > flag not change any thing for normal window in captured video, the > worke > same like use CAPTUREBLT flag. So the can capture window even if it > is > covered.
Ah, fun, this is based on a misinterpretation of the windows documentation: CAPTUREBLT Includes any windows that are layered on top of your window in the resulting image. By default, the image only contains your window. But according to this StackOverflow response: https://stackoverflow.com/a/4646999 What that actually means is that CAPTUREBLT includes windows with the "WS_EX_LAYERED" window style that overlap the window, not *any* window. Layered windows are described in: https://docs.microsoft.com/en-us/windows/win32/winmsg/window-features#layered-windows I think we should unconditionally remove the CAPTUREBLT flag, there's no need for any options or documentation changes. -- Calvin Walton <calvin.wal...@kepstin.ca> _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".